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将离子液体和TiO_2P25纳米颗粒物理掺杂,构建了具有选择性降解功能的离子液体-TiO_2复合光催化体系,实现了染料废水的选择性降解。研究发现,离子液体的加入能够提高TiO_2对阴离子染料的降解效率,抑制阳离子染料的降解。通过优化离子液体的结构、用量等因素,筛选出了最佳复合体系[C_(10)mim](CF_3SO_2)_2N-TiO_2P25(物质的量比为20∶1)。紫外光照射下,20 min即可将10.0 mg/L甲基橙溶液几乎脱色完全,而对阳离子染料的降解几乎完全抑制。该体系可以选择性地降解染料废水中的某一组分,简化阴阳染料的分离和回收。
Ionic liquids and TiO 2 P 25 nanoparticles were physically doped, and an ionic liquid-TiO 2 composite photocatalytic system with selective degradation was constructed to achieve the selective degradation of dye wastewater. The study found that the addition of ionic liquids can improve the degradation efficiency of TiO 2 on anionic dyes and inhibit the degradation of cationic dyes. The optimized composite system [C 10 Mim] (CF 3 SO 2) 2N-TiO 2 P 25 was selected by optimizing the structure and dosage of ionic liquid. Ultraviolet irradiation, 20 min to 10.0 mg / L methyl orange solution almost completely decolorized, while the degradation of cationic dyes almost completely inhibited. The system can selectively degrade a certain component of dye wastewater to simplify the separation and recovery of yin and yang dyes.